Polycations
(polycation 的复数) 聚阳离子
🗣️ 情景例句
And in this family.
也在这个家 。
After a while,we found a shady place under some poplar trees.
在一会儿以后，我们在一些白杨树下面发现了一块遮阴的地方。
Only two stray dogs benefited from all this confusion, for they greedily devoured what was left of the cake.
只有两只野狗从这一片混乱中得到好处，它们贪婪地吃掉了剩下的蛋糕。